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On average, building a custom or built-in closet costs around $2,100. However, the total price can range from as little as $500 for a simple DIY project to $6,000 or more for a large, high-end custom closet. Most projects typically fall between $1,500 and $5,000.

The final cost depends on several factors, including the closet's size, type, materials, and features. Here is a general cost breakdown by closet type:

• Reach-in closet: $500 to $1,500

• Walk-in closet: $750 to $5,000

• Wardrobe: $2,000 to $6,000 or more

Choosing a prefabricated closet system is generally less expensive than a fully custom build. The scope of design and construction services will also significantly impact the price.

Whether it’s less expensive to build or buy a closet depends on both the type of closet and whether or not you’d be constructing it yourself. The cost of custom closets built by a pro ranges from $1,300 to $3,800, but you may be able to DIY it for as little as $400. By contrast, prefabricated options go as low as $200 and up to $3,000, so it’s almost always less expensive to go this route. 

Yes, 12-inch shelves are often considered the standard closet shelf depth for storing folded clothing, shoes, and small containers. However, if you plan to store bulky items such as blankets, baskets, or cleaning supplies, you may want to go deeper. For specialized layouts, an adjustable system can give you more flexibility.

Bump-out additions can add some space to a closet without requiring any significant structural work. This entails pushing back the existing rear or side of the closet, simply moving the wall into either an adjacent room or unused space. For ground-floor closets, this could even be extended to the exterior of the home, but that has its own complications. Bump-outs are a good discussion to have with your contractor if you’re just looking to increase the space a little—not renovate the entire closet space.